n. 25B6; adjective
a familiar task : WELL KNOWN, recognized, accustomed; common, commonplace, everyday, day-to-day, ordinary, habitual, usual, customary, routine, standard, stock, mundane, run-of-the-mill; poetic/literary wonted.
are you familiar with the subject? : ACQUAINTED, conversant, versed, knowledgeable, well informed; skilled, proficient; at home with, no stranger to, au fait with, au courant with; informal well up on, in the know about, genned up on, clued up on.
a familiar atmosphere : INFORMAL, casual, relaxed, easy, comfortable; friendly, unceremonious, unreserved, open, natural, unpretentious.
he is too familiar with the teachers : OVERFAMILIAR, presumptuous, disrespectful, forward, bold, impudent, impertinent.
formal.